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8540.20.40.00/S-20 Photocathode Spectral Response Tube/Mexico

S-20 Photocathode Spectral Response Tube from Mexico

S-20 spectral response photocathode tubes optimize UV-visible detection for photomultipliers and image converters. HTS 8540.20.4000 covers these extended red response photocathode tubes. Standard in analytical instrumentation.

Duty Rate — Mexico → United States

13.3%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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Import Tips

• Quantum efficiency curves by wavelength required for customs; common in flow cytometry imports

• Avoid 9027 instrument classification